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I would again suggest (as I did a few days ago in more detail) that,
for situations observing a generalized Bernoulli's law (which applies
to steady, nonviscous, *compressible*, streamline fluid flow and
encompasses so-called "incompressible" flow):
1. In the frame of the fluid, the molecular velocity distribution is
isotropic. Any anisotropy is a simple and direct result of working
(as one must) in *the* frame (for non"boring" cases†) in which the
flow is "steady."
2. The pressure reduction in high velocity areas is mostly a direct
result of lower density (less "squeezing") and only partially a
result of smaller average velocities (due to the temperature
reduction that accompanies the barotropic density reduction)
3. The role of velocity/temperature changes becomes negligible as one
goes to the "incompressible" limit. In that limit, the (close to
negligible) density reduction is almost entirely responsible for the
pressure reduction.